bailey



UNITED STATES `PATENT oEEicE.

J. T. FOSTER AND L. R1. BAILEY, OF'NEW "YORK, N. Y.

ROCK-DRILLEE.

Specification of Letters Patent No. `5,95f1, dated December, 1848.y -V

To all whom zmay concern.'

' Be it known that we, JOHN T. FOSTER and LYMAN R. BAILEY, of the city, county, and State of New York, have invented a new and useful Machine for Drillingor Boring Holes in Rocks; and we hereby do declare that the following is a full and exact description.

The nature of our invention consists in providing a frame of metal or any other material most convenient and said frame made with an arch on it, in which is a curved groove or slot, in the whichl is a curved sliding box attached to a drill stock, by which a Spindle land chisell can be made to drill holes in rocks at any angle and operate either horizontally or perpendicularly. j

Also in employing a percussion and reactive force to the o-peration ofdrillin bycombining a spiral Spring with the drill stock and spindle and operating the same by a cam fixed on an axle of one or two power wheels, by the which contrivance a force is brought to bear upon the drilling of rocks in a far more effectual and economical manner than any heretofore known.

The nature of this invention also consists in the peculiar feeding gear, as it is technically termed, by which the drill is allowed to exert the full force applied without .jarring the machinery of the machine, so as to prevent the breaking of chisels7 events which are common to the present known modes of drilling, causing frequent and expensive delays.

The nature of the invention also consists in having adjustable legs attached to the frame of the machine to accommodate the machine to uneven ground'on which to stand and also in providing a ointed curved chisel to excavate a greater diameter of bore at the bottom of holes for the purpose of more effectual explosions than by the present known plan for this purpose.

To enable others skilled in the art to make and use this machine we will now describe its construction and operation reference being had to the accompanying drawings making part of this specification in which- Figure l is a perspective view. Fig. 2 a

side or khorizontal elevation. Fig. 3 a sectional view. Fig. 4 a cam and Fig. 5 a jointed curved chisel.

(A) represents the frame of the machine (B) the power or driving wheels.

the figures.

* (C) is a grooved or curved arch, cast on the frame, or firmly attached to it by other I neans, 1t has a curved Slot or groove init, in which is nicely fitted a curved sliding The same let-ters'indicate like parts von all box (D) capable of sliding round the whole i circular part of the arch. is a drill stock attached tothe sliding box (D) by rivets or screws and in this manner connected with the frame. (E) is a pin for fasten ing the sliding box to any angle on the arch through or by holes on the face of the arch, or the outer convex part. By moving the sliding box to any angle on the arch, the( drill stock is carried to said angle yalso and the pin holds the sliding box and drill stock firm to the frame for the operation of drilling.

(G) is a spindle with two tiers of racks, cut on it and the chisel or drill -is fixed on this spindle. This spindle passes through two openings atthe ends of the drill stock, parallel to each other,` answering as guides to the spindle and'to give it a steady motion. (H) is a collar` or hub. It is made of metal, is hollow and the spindle' (G) plays or works yin and through it. By this collar the spindle isconnected with the drill stock and frame. On the spindle (Gr) are two racks, to the teeth of one rack projecting downward and the other rack or ratchet tier, projecting upward (or in a contrary direction .as vdescribed by (L) Fig. 3 and Vsame figure.

(R) and (S) are two common springpawls on (H) the collar, (which we are particular to describe minutely) these pawls catch into the teeth of the racks on the spindle through openings in (H) and thus are united or combined, 4the collar with the spindle. By pressing on the spring of pawl (R), the spindle can be drawn through the collar in one direction, and by pressing on the Spring of (S) the spindle can be pushed through the collar in another direction to increase or diminish the point of the chisel, in distance from the object to be drilled. On one end of (H)is firmly fixed a small ratchet pinion (O) having teeth cut on its periphery and also on the `side of its periphery, for

' the purpose of turning around the collar andv spindle. This is done in the following man` ner: is an axle on which the power wheels are'fixed. This axle is confined to the frame by solid circular boxes or gudgeons of such size as to allow the axle to rea volve freely within them. On the center of this axle which extends across the frame, is xed a cam described by Fig. Ll.-l\low as the power .wheels are propelled, the cam on the axle catches (O) and in this manner lifts up both the collar and spindle twice' during every revolution of the axle and as' (O) is raised and lowered, or moved back-N wards and fordward (Q) the pallet on the drill stock gives with the motion ofthe pinion and (P) catches it when it comes back and thus keep moving the Collar and spindle continually around which is necessary for the purpose of drilling a round hole with a chisel. lConnected with the collar H is another very important arrangement, by which the spindle and `drill are allowed to work freely without jarring the drill stock. It will readily be perceived that if there were not some ararngement to mitigate the force of the collar when exerted against the drill stock, the weight of the spindle and the power' or force appliedto it would soon shatter the drill stock to pieces, by the power applied to the spindle being spent against the drill stock, instead of the rock to be drilled. To obviate this evil and to make the drill operate smoothly andy eifectually, a circular cam (T) is fastened on the one end of the drill stock. This cam is solid with an opening in its center through which the spindle passes. (Fig. 3) the sectional view represents principally this important arrangement. 'When the inside of (T) is struck by the spring of pawl in its, descent, `the collar` is, orrather the spindle is thrown out of gear with the collar and the spindle and chisel allowed to exert the full force that may be applied to them without jarring the drill ystock, and whenever the chisel strikes the rock, gears into the spindle again, and whatever reac'- tion force there may be resulting fromthe 'action of the chisel upon the rock the spiral spring I gives or Vaccommodates itself to said action and allows the chisel and spindle to work smoothly without jarring.

Thus we haveexplained the nature of our invention its construction and mode of operation. s

We claim as our invention- The combination of the collar with the drill stock and spindle by the pawls (R) and (S) and the pinion (O) and the palletts (P) and (Q) for the purpose of feeding and changing gear, substantially as set forth.

February 4th, 1848.

J. T. FOSTER. LYMAN R. BAILEY. 

